We just started selling Macs at the electronics retailer I work at. Apple only sent us the old pre-SantaRosa MacBooks, so that's what we sell to customers. I'm the only Mac user in our computers department, so I was the only one that noticed. I asked our supervisor about it, and he told me that customers wouldn't know the difference, so I should say nothing.
You'd be surprised what happens behind the scenes of electronics retail stores.